CVE-2021-46757: ryzen embedded Buffer Overflow — Fix

Description

Insufficient checking of memory buffer in ASP Secure OS may allow an attacker with a malicious TA to read/write to the ASP Secure OS kernel virtual address space potentially leading to privilege escalation.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-119 Buffer Overflow

Affected Products

Vendor	Product	Versions
amd	ryzen_embedded_5950e_firmware	< embam4pi_1.0.0.0
amd	ryzen_embedded_5950e	All
amd	ryzen_embedded_5900e_firmware	< embam4pi_1.0.0.0
amd	ryzen_embedded_5900e	All
amd	ryzen_embedded_5800e_firmware	< embam4pi_1.0.0.0
amd	ryzen_embedded_5800e	All
amd	ryzen_embedded_5600e_firmware	< embam4pi_1.0.0.0
amd	ryzen_embedded_5600e	All
amd	ryzen_embedded_v2516_firmware	< embeddedpi-fp6_1.0.0.6
amd	ryzen_embedded_v2516	All
amd	ryzen_embedded_v2546_firmware	< embeddedpi-fp6_1.0.0.6
amd	ryzen_embedded_v2546	All
amd	ryzen_embedded_v2718_firmware	< embeddedpi-fp6_1.0.0.6
amd	ryzen_embedded_v2718	All
amd	ryzen_embedded_v2748_firmware	< embeddedpi-fp6_1.0.0.6
amd	ryzen_embedded_v2748	All
amd	ryzen_embedded_r2312_firmware	< embeddedpi-fp6_1.0.0.6
amd	ryzen_embedded_r2312	All
amd	ryzen_embedded_r2314_firmware	< embeddedpi-fp6_1.0.0.6
amd	ryzen_embedded_r2314	All

References

Advisories & Patches

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001 https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001

Frequently Asked Questions

What is CVE-2021-46757? +

Insufficient checking of memory buffer in ASP Secure OS may allow an attacker with a malicious TA to read/write to the ASP Secure OS kernel virtual address space potentially leading to privilege escalation. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-46757? +

CVE-2021-46757 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2021-46757? +

CVE-2021-46757 affects products from amd, specifically: ryzen_embedded_5600e, ryzen_embedded_5600e_firmware, ryzen_embedded_5800e, ryzen_embedded_5800e_firmware, ryzen_embedded_5900e, ryzen_embedded_5900e_firmware, ryzen_embedded_5950e, ryzen_embedded_5950e_firmware, ryzen_embedded_r2312, ryzen_embedded_r2312_firmware, ryzen_embedded_r2314, ryzen_embedded_r2314_firmware, ryzen_embedded_v2516, ryzen_embedded_v2516_firmware, ryzen_embedded_v2546, ryzen_embedded_v2546_firmware, ryzen_embedded_v2718, ryzen_embedded_v2718_firmware, ryzen_embedded_v2748, ryzen_embedded_v2748_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2021-46757? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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